Specification Brand : Trimmers Parts BulletPoint1 : Trimmer head dianmeter: 3-3/4",Fits for Pas210 Pas211 Pas225 PAS Models With The Straight Shaft Trimmer Attachment.Screw Model-M10*1.25. BulletPoint2 : The trimmer head is made of wear-resistant ABS material, which can effectively protect the internal function from being damaged. The attached line is made of nylon material, which is not easy to break during the cutting process. BulletPoint3 : Replacement trimmer head parts number:99944200908,The product can only be rotated to the right, so it is also suitable for 99944200907b number that can be rotated left and right.compatible with Echo 400 SRM 210, SRM 225, SRM 200, SRM 230, SRM 250, SRM 265,SRM 266, SRM 280, SRM 2100, SRM 2400, SRM260, SRM260-S, SRM230, SRM230S, SRM210, SRM21-SB, SRM210-i. BulletPoint4 : Easy to install, you don't need to take the trimmer head apart to change the line, and the seat only rotates to the right. BulletPoint5 : You will get 1* String trimmer head and,If you have any problems with the product, you can contact us as soon as possible, and we will solve the problem for you. Color : Black ExternallyAssignedProductIdentifier : 7695967441596 ExternallyAssignedProductIdentifier1 : 797874992530 ExternallyAssignedProductIdentifier2 : 0797874992530 IsAssemblyRequired : 1 ItemName : Genuine Echo C535000320 C535000310 Blade Fixture Adapter Plate Fits SRM-261T SRM-265T SRM-266T SRM-280T Trimmers ItemPackageDimensions_Height : 2.5 inches ItemPackageDimensions_Length : 4.2 inches ItemPackageDimensions_Width : 4.2 inches ItemTypeKeyword : string-trimmer-replacement-parts ItemTypeName : String Trimmer Head Manufacturer : Trimmers Parts Material : Plastic ModelName : STH-09 ModelNumber : STH-09 NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : STH-1P-Vine9 PowerSourceType : manual ProductDescription : ECHO Fixture Adapter Plate Part# C535000320 & C5350003210 Fits the following: SRM-261T (S66411001001 - S66411999999) Straight Shaft Trimmer / Brushcutter SRM-265T (S81013001001 - S81013999999) Straight Shaft Trimmer / Brushcutter SRM-261T (S73912001001 - S73912999999) Straight Shaft Trimmer / Brushcutter SRM-261T (S81413001001 - S81413999999) Straight Shaft Trimmer / Brushcutter SRM-261T (06001001 - 06999999) Straight Shaft Trimmer / Brushcutter SRM-261T (07001001 - 07999999) Straight Shaft Trimmer / Brushcutter SRM-280T (S66711001001 - S66711999999) Straight Shaft Trimmer / Brushcutter SRM-280T (S74212001001 - S74212999999) Straight Shaft Trimmer / Brushcutter SRM-280T (S81713001001 - S81713999999) Straight Shaft Trimmer / Brushcutter SRM-265T (S66011001001 - S66011999999) Straight Shaft Trimmer / Brushcutter SRM-265T (S73511001001 - S73511999999) Straight Shaft Trimmer / Brushcutter SRM-266T (T42411001001-T42411999999) High Torque Trimmer SRM-266T (T42512001001-T42512999999) High Torque Trimmer SRM-266T (T43413001001-T43413999999) High Torque Trimmer SRM-265T (S79812001001-S7812999999) Straight Shaft Trimmer / Brushcutter SRM-265T (S70511001001-S70511999999) Straight Shaft Trimmer / Brushcutter ProductSiteLaunchDate : 2023-08-25T14:29:10.373Z SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 1